HttpURLConnection 的用法

HttpURLConnection 是 URLConnection 的子类，它提供了更多与 HTTP 有关的处理方法， 
* 比如：如果你希望获得服务器响应的HTTP代码，比如：2XX，3XX等
* 比如：你希望设置是否自动进行客户端重定向（缺省是自动重定向）
* 比如：你希望指定向服务器提交的 HTTP METHOD（GET 或 POST 等）

@Test
  public void testHttpURLConnection() {
    try {
      String urlString = "http://66.10.113.8:8080/hiapi/paas/asset/db";
      URL url = new URL(urlString); //代表了一个网址
      //设置是否自动进行重定向，缺省这个值为true
      HttpURLConnection.setFollowRedirects(false);
      HttpURLConnection conn =
          (HttpURLConnection)url.openConnection();
      //设置HTTP METHOD
      conn.setRequestMethod("GET");
      int code = conn.getResponseCode();
      System.out.println("服务器响应代码为："+code);
      InputStream is = conn.getInputStream();
      //将InputStream转换为Reader，并使用缓冲读取，提高效率，同时可以按行
      BufferedReader br = new BufferedReader(new
          InputStreamReader(is,"UTF-8"));
      String line = null;
      while((line = br.readLine()) != null){
        System.out.println(line);
      }
      is.close();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }

运行结果

Connected to the target VM, address: '127.0.0.1:58065', transport: 'socket'
Disconnected from the target VM, address: '127.0.0.1:58065', transport: 'socket'
[{"sign":"paas","deptId":103,"hostName":"66.3.125.80,66.3.125.81,66.3.125.82","port":"1521","dbId":88,"dbType":"ORACLE","dbName":"nnsptf","isCapture":null,"dbaUser":"system","dbaPwd":"oracle","dbAlias":"压测1"},{"sign":"paas","deptId":103,"hostName":"66.3.125.80,66.3.125.81,66.3.125.82","port":"1521","dbId":96,"dbType":"ORACLE","dbName":"cjecgc","isCapture":null,"dbaUser":"system","dbaPwd":"oracle","dbAlias":"测试ora"},{"sign":"paas","deptId":105,"hostName":"66.3.125.80,66.3.125.81,66.3.125.82","port":"1521","dbId":157,"dbType":"ORACLE","dbName":"uujarl","isCapture":null,"dbaUser":"system","dbaPwd":"oracle","dbAlias":"溧水库"},{"sign":"paas","deptId":105,"hostName":"66.3.125.80,66.3.125.81,66.3.125.82","port":"1521","dbId":164,"dbType":"ORACLE","dbName":"qwxutc","isCapture":null,"dbaUser":"system","dbaPwd":"oracle","dbAlias":"溧水数据库2"},{"sign":"paas","deptId":103,"hostName":"66.3.125.80,66.3.125.81,66.3.125.82","port":"1521","dbId":298,"dbType":"ORACLE","dbName":"vosrtz","isCapture":null,"dbaUser":"system","dbaPwd":"oracle","dbAlias":"zijin001"},{"sign":"paas","deptId":103,"hostName":"66.3.125.80,66.3.125.81,66.3.125.82","port":"1521","dbId":299,"dbType":"ORACLE","dbName":"pffklf","isCapture":null,"dbaUser":"system","dbaPwd":"oracle","dbAlias":"zijin002"}]
Process finished with exit code 0